# HG changeset patch
# User David Bateman <dbateman@free.fr>
# Date 1283888738 -7200
# Node ID c9786e03670c4534796e026e7387ec5f25d226cb
# Parent  848f3a13b7cfe75938ecdea6e7d6fc16d25eef5b
Don't create __plotyy_axes__ properties in plotyy if they exist (Bug #30977)

diff --git a/scripts/ChangeLog b/scripts/ChangeLog
--- a/scripts/ChangeLog
+++ b/scripts/ChangeLog
@@ -1,8 +1,13 @@
+2010-09-07  David Bateman  <dbateman@free.fr>
+
+	* plot/plotyy.m: Don't add the __plotyy_axes__ property to the
+	axes handles if iit already exists.
+
 2010-09-06  Petr Mikulik <mikulik@physics.muni.cz>
 
 	* geometry/griddata.m: Allow x, y to be vectors, and z a matrix.
 
-2010-07-07  David Bateman  <dbateman@free.fr>
+2010-09-03  David Bateman  <dbateman@free.fr>
 
 	* geometry/delaunay.m: Allow the delaunay function to treat
 	matrices of the same size for compatibility.
diff --git a/scripts/plot/plotyy.m b/scripts/plot/plotyy.m
--- a/scripts/plot/plotyy.m
+++ b/scripts/plot/plotyy.m
@@ -195,9 +195,16 @@
   set (ax, "tag", "plotyy")
 
   ## Store the axes handles for the sister axes.
-  addproperty ("__plotyy_axes__", ax(1), "data", ax);
-  addproperty ("__plotyy_axes__", ax(2), "data", ax);
-
+  try 
+    addproperty ("__plotyy_axes__", ax(1), "data", ax);
+  catch
+    set (ax(1), "__plotyy_axes__", ax);
+  end_try_catch
+  try 
+    addproperty ("__plotyy_axes__", ax(2), "data", ax);
+  catch
+    set (ax(2), "__plotyy_axes__", ax);
+  end_try_catch
 endfunction
 
 %!demo